I didn't think this was that bad. I didn't even know what kind of game it was at first. I thought you were going to be directing something through the maze. The graphics aren't bad, but they do look a tad dated. The music's pretty nice. I guess I wouldn't recommend this, but it's not by any means terrible.
It is a pretty cute game. I like how you can change the color of your towers. I guess it makes sense with the title. The enemies and towers could be a bit more detailed, though. It's fine for what it is.